Crédit Agricole's test notification triggers system overload for millions
Developer error sent test notification to 11 million Crédit Agricole users, crashing the app.
Event / Security
Crédit Agricole System Outage
Crédit Agricole accidentally sent an internal test notification to 11 million users of its Ma Banque application on June 9, 2026, causing the application and website to become inaccessible due to the notification surge.
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2026-08-16 to 2026-11-13 · UTC publication dates
Coverage begins 10 Jun, 11:36 UTC
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What happened
Crédit Agricole application outage caused by surge in login attempts
The unexpected surge in simultaneous login attempts triggered by the errant test notification caused the Ma Banque application and website to become inaccessible. Customers could not access the application and several bank branches became unreachable by phone. Crédit Agricole confirmed that information systems were not compromised.
Crédit Agricole sent test notification to 11 million users due to developer error
A developer named Cédric at Crédit Agricole accidentally sent an internal test notification reading "Test cedric" to approximately 11 million users of the Ma Banque mobile application on June 9 at 4:30 PM. The developer intended to test the internal notification system but mistakenly triggered the external send instead.
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